Microwave-Assisted Magnetic Reversal in Perpendicular Media

Author

Boone, C. ; Katine, J.A. ; Marinero, E.E. ; Pisana, S. ; Terris, B.D.

Author_Institution

Hiatchi Global Storage Technol., San Jose Res. Center, San Jose, CA, USA

Volume

3

fYear

2012

fDate

7/4/1905 12:00:00 AM

Firstpage

3500104

Lastpage

3500104

Abstract

Microwave-assisted magnetic reversal (MAMR) has not yet been characterized in hard perpendicular media. We investigate MAMR in such media experimentally for monolayer and bilayer magnetic thin films. The coercive field can be reduced by 8% in our geometry. The response occurs over a broad frequency range which is due to the excitation of long-wavelength spin-wave modes which can help drive reversal. Our results qualitatively match simple micromagnetic modeling.

Keywords

chromium alloys; cobalt alloys; coercive force; magnetic multilayers; magnetic thin films; magnetisation reversal; metallic thin films; monolayers; platinum alloys; silicon compounds; spin waves; CoPtCr-SiO₂BO₂; MAMR; bilayer magnetic thin films; coercive field; hard perpendicular media; long-wavelength spin-wave modes; magnetic multilayers; magnetisation reversal; micromagnetic modeling; microwave-assisted magnetic reversal; monolayer magnetic thin films; Magnetic domains; Magnetic hysteresis; Magnetic multilayers; Magnetic recording; Magnetic resonance; Media; Switches; Magnetodynamics; microwave switching; microwave-assisted magnetic reversal (MAMR);

fLanguage

English

Journal_Title

Magnetics Letters, IEEE

Publisher

ieee

ISSN

1949-307X

Type

jour

DOI

10.1109/LMAG.2011.2180368

Filename

6151243